summon ominous_item_spawner ~ ~ ~ {item:{id:"poisonous_potato",components:{"minecraft:custom_data":{byMIS:true}}},spawn_item_after_ticks:60L,Tags:[temp]}
$data modify entity @n[tag=temp,distance=..1,type=ominous_item_spawner] item merge from storage dab:maps Maps[{id:"$(Mapid)"}].DefaultPool[$(PoolIndex)]

tag @n[tag=temp,distance=..1,type=ominous_item_spawner] remove temp